The U.S. government has warned for years that products from China’s Huawei Technologies Co., the world’s biggest maker of telecommunications equipment, pose a national security risk for any countries that use them. As Washington has waged a global campaign to block the company from supplying state-of-the-art 5G wireless networks, Huawei and its supporters have dismissed the claims as lacking evidence.
Now a Bloomberg News investigation has found a key piece of evidence underpinning the U.S. efforts — a previously unreported breach that occurred halfway around the world nearly a decade ago.
In 2012, Australian intelligence officials informed their U.S. counterparts that they had detected a sophisticated intrusion into the country's telecommunications systems. It began, they said, with a software update from Huawei that was loaded with malicious code.